Technical description and composition of the LG 32LH513U TV, panel type and applicable modules. The composition of the modules.LG LED
Model: 32LH513U LG 32LH513U-ZE
Chassis / Version: LD67C
Panel: HC320DXN-VHVS1-214X
LED backlight: 32LH51 HD SSC REV05 150925
T-CON: 6870C-0442B 32/37 ROW2.1 HD VER 0.1
LED driver (backlight): integrated into MainBoard
PWM LED driver: MP3378E
MOSFET LED driver: AOD2922
Power Supply (PSU): Adapter ADS-45FSN-19 (19 V / 2.1 A)
MainBoard: EAX66805906 1.0
IC MainBoard: LGE6351, H27U1G8F, MX25L8035E, DT1803A, SN1406035, NTP7515
Tuner: TDJA-G301D
Control: EBR80772001
Specifications 52LG5030
LG 32LH513U
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The LG 32LH513U TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
In some of these cases, a malfunction is detected in the adapter power module.
This TV model is equipped with an external adapter type ADS-45FSN-19 (19 V / 2.1 A), which the owner can purchase independently, and repairing it may not always be advisable, however, sometimes there is some reason to open it and eliminate simple typical defects characteristic of IIP. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches and rectifier diodes for a probable short circuit.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement with new ones, or obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
Often in such cases, there is no LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as a health indicator. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the EAX66805906 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - LGE6351, H27U1G8F, MX25L8035E, DT1803A, SN1406035, NTP7515 with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the power supply of the TDJA-G301D tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Owners of the 32LH513U TV are advised to contact qualified personnel with the necessary work experience for repairs! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
Service manual and schematic diagram -------------------> LG 32LH513U Chassis LD67C
MODELS 32LH510B, 32LH510U, 32LH513U, 32LH519U, 32LH520U, 32LH520U - ZA/ZC/ZE/ZG.
FIRMWARE SPI FLASH LG 32LH513U LG 32LH513U-ZE LD67C, Main: EAX66805906 1.0, Panel: HC320DXN-VHVS1-214X
To reduce the backlight current in LED drivers with the MP3378E PWM controller, it is necessary to proportionally increase the total resistance of the resistors from pin 3 (RISET) to the chassis. Calculation of current in milliamperes and resistance in kilo-ohms 977 / Rset for each channel. Parallel channels are summed. For example, for four parallel channels and a RISET 10 KOhm resistance, the total current will be 97.7 * 4 = 391 mA.
More details on this page
The appearance of the MainBoard EAX66805906 is shown in the figure below:EAX66805906
EAX66805906 can be used in TVs:
LG 32LH510U (Panel HC320DXN-VSVS1 - 511X), LG 43LH513V (Panel HC430DUN-SLVX1 - 511X), LG 32LH520U (Panel HC320DXN-ABVS2-5112), LG 43LH520V (Panel LC430DUE (FJ)(A1)), LG 32LH513U LG 32LH513U-ZE (Panel HC320DXN-VHVS1-214X), LG 49LH520V (Panel LC490DUE (FJ)(A1)).
Main features of the device LG 32LH513U:
Installed matrix (LED-panel) HC320DXN-VHVS1-214X.
The matrix control uses the Timing Controller (T-CON) 6870C-0442B.
To power the backlight LEDs, a converter is used, combined with the main board EAX66805906, controlled by the MP3378E PWM controller. As power elements of the LED driver, keys of the AOD2922 type are used.
To power all the internal components of the LG 32LH513U TV, an external adapter type ADS-45FSN-19 (19 V / 2.1 A) is used.
MainBoard - the main board (motherboard) is an EAX66805906 module, using chips LGE6351, H27U1G8F, MX25L8035E, DT1803A, SN1406035, NTP7515 and others.
The TDJA-G301D tuner provides TV reception and channel tuning.